Cheap Custom medium volume LCDs

Started by Klaus Kragelund in sci.electronics.design8 years ago 20 replies
LCD

Hi We need STN or derivative LCD display, 128x64 dots, 50x60mm, very low power and low price I have the following I can...

Hi We need STN or derivative LCD display, 128x64 dots, 50x60mm, very low power and low price I have the following I can ask: Sharp Winstar Display Tech Varitronix Anyone know of an alternative manufactor that has nice prices that will do custom designs? Thanks Klaus


7V on 5V power plug

Started by Anonymous in sci.electronics.design7 years ago 7 replies

If it looks right, plug it in. That's what happened when someone plug in a 300mA wall plug into a 7" tablet expecting 5V 2A. I measured the...

If it looks right, plug it in. That's what happened when someone plug in a 300mA wall plug into a 7" tablet expecting 5V 2A. I measured the DC out and got 7V. The battery (4V) also got 7V. So, most of the electronics are fried. But the interesting thing is that the LCD screen come up for a few seconds complaining a low battery condition. So, some thing is still working. The question...


Riello uninterruptible power supply

Started by Jean-Pierre Coulon in sci.electronics.design6 years ago

The manual claims "selectable output range" but how can you select this range in non-battery mode? It seems you can only select the battery-mode...

The manual claims "selectable output range" but how can you select this range in non-battery mode? It seems you can only select the battery-mode voltage with the front panel LCD. Are there undocumented features ? Regards, -- Jean-Pierre Coulon


Question About Color LCD Displays

Started by Anonymous in sci.electronics.design5 years ago 1 reply
LCD

I have already looked online and the answers do not seem to be forthcoming. A while back I had to change a broken screen on a laptop. So me...

I have already looked online and the answers do not seem to be forthcoming. A while back I had to change a broken screen on a laptop. So me and a buddy, over a six pack plus decided to take the broken panel apart. I was kinda expecting to see some sort of layer with color filters so they can do red, green and blue. I examined this SOB pretty good and there was no such thing


About LEDs and LCDs

Started by Jan Panteltje in sci.electronics.design4 years ago 29 replies

My lab power supply display slowly turned black during the last few month...: http://panteltje.com/pub/LCD_turning_black_IMG_6329.JPG It is...

My lab power supply display slowly turned black during the last few month...: http://panteltje.com/pub/LCD_turning_black_IMG_6329.JPG It is an old design and OK after all those years, but why does this process happen? I once had an LCD watch and when sitting in the sun outside all of the sudden it turned black.. was very hot, bought a new one. This thing has not been hot. So, anyways ha...


LCD drivers

Started by John Larkin in sci.electronics.design5 months ago 11 replies

https://www.marketwatch.com/story/the-tiny-1-chip-that-is-behind-record-price-increases-for-comp uters-11623958037?mod=home-page Does anybody...

https://www.marketwatch.com/story/the-tiny-1-chip-that-is-behind-record-price-increases-for-comp uters-11623958037?mod=home-page Does anybody have any FTDI FT800s? Maybe swap for something you need? -- John Larkin Highland Technology, Inc trk The cork popped merrily, and Lord Peter rose to his feet. "Bunter", he said, "I give you a toast. The triumph of Instinct over R


CO detector quit after five years, why?

Started by Joerg in sci.electronics.design8 years ago 98 replies

Folks, It woke us up last night ... BIPP .. BIPP .. BIPP ... accompanied by "err" on its LCD. Same when running on the (full) backup battery...

Folks, It woke us up last night ... BIPP .. BIPP .. BIPP ... accompanied by "err" on its LCD. Same when running on the (full) backup battery so it's unlikely an electrolytic. It is a "First Alert CO614" and has a brown cylinder about the size of an AA battery where it says SEN+ and SEN- on the PCB. Anyone know whether these can be rejuvenated somehow? Maybe the sensor needs cleaning? ...


Small graphics LCDs

Started by Phil Hobbs in sci.electronics.design9 years ago 15 replies
LCD

Hi, all, I'm working on a small instrument that (very unusually for me) needs a small built-in graphics display. A few questions: 1....

Hi, all, I'm working on a small instrument that (very unusually for me) needs a small built-in graphics display. A few questions: 1. What's everybody's favourite small graphics LCD? (128 x 64 or larger, monochrome) 2. The controller chip manuals are all in Chinglish. Any good tutorials out there? The NXP sample code is all for fancier displays. It looks as though the pixels are...


My TI-30Xa

Started by Jamie in sci.electronics.design9 years ago 9 replies
LCD

I returned to work today after vacation week, and grabbed my calculator, pins, a couple of precision screw drivers I carry around with me,...

I returned to work today after vacation week, and grabbed my calculator, pins, a couple of precision screw drivers I carry around with me, in my shirt pocket. I wanted to Kack-CU_late something before going to work. Pulled open the slide cover to the TI-30, turned it on, and noticed the bottom row of the LCD was missing. I said Hummm... So, I quickly retrieved a $3.00 calculator I ...


Semi OT: vintage word processing

Started by bitrex in sci.electronics.design3 years ago 35 replies

In junior high, before my family had a "real" computer, I cranked out many a school report on my parent's Panasonic Penwriter word processor....

In junior high, before my family had a "real" computer, I cranked out many a school report on my parent's Panasonic Penwriter word processor. It was like an electronic typewriter with a tiny LCD display for entering text, but instead of a daisy wheel or something it had four color pens controlled by servos and some limited ability to do vector graphics, I remember doing some really nice-...


Soldering iron

Started by Dirk Bruere at NeoPax in sci.electronics.design10 years ago 41 replies
LCD

Looking for a cheap but reasonably good iron. Anyone have any opinions on this Chinese one? Precision Gold,...

Looking for a cheap but reasonably good iron. Anyone have any opinions on this Chinese one? Precision Gold, 60W: http://www.ebay.co.uk/itm/60W-Professional-LCD-Digital-Soldering-Station-Iron-Kit-ESD-Anti-Stati c-Safe-/390391559549?pt=UK_Home_Garden_PowerTools_SM&hash=item5ae526757d#ht_945wt_1270


AO4600 equivalent?

Started by Don Y in sci.electronics.design6 years ago 2 replies
LCD

Hi, A local non-profit just dropped of half a dozen LCD monitors that all appear to have suffered the same (inverter) failure. ...

Hi, A local non-profit just dropped of half a dozen LCD monitors that all appear to have suffered the same (inverter) failure. Suggestions for an AO4600 replacement? (SOIC8, Vds=30V, Id=6.9A, Rds(on)~30mOhm, Pd=2W) I'd rather spend a few extra pennies on an "improved" component than be called on to make a similar repair, again (my time and components are pro bono; the time worth much mor...


OT: Universal Remotes & Projection TV's

Started by Jim Thompson in sci.electronics.design10 years ago 13 replies

OT: Universal Remotes & Projection TV's... Our 18 year-old rear projection TV (55" Letter-box) has finally failed... or not quite... the blue...

OT: Universal Remotes & Projection TV's... Our 18 year-old rear projection TV (55" Letter-box) has finally failed... or not quite... the blue sweep only, dips dramatically in the upper middle of the screen making for some garish looking pictures... particularly on old B&W Hitchcock re-runs (playing here w/o commercials ;-) So I bought a 55" LCD (LED-backlit) at 1/4 the price of the origin...


Just for fun, the audiophile light amplifier

Started by Jan Panteltje in sci.electronics.design4 years ago 6 replies

Just for fun, the audiophile light amplifier Was reading about that audio tube, and wondering You now, clean energy, solar etc... So what...

Just for fun, the audiophile light amplifier Was reading about that audio tube, and wondering You now, clean energy, solar etc... So what if transmissive modulated changing LCD panel light voltage / current sun O --> -- light --> -- [] --> -- -> - ---> --- Ge photo diode --> -- -> - ---> --- headphones.


Increasing EL inverter drive power

Started by bitrex in sci.electronics.design2 years ago 8 replies

Not sure if the EL material I have available is less efficient than how it used to be back in the day, but this inverter circuit: Can't...

Not sure if the EL material I have available is less efficient than how it used to be back in the day, but this inverter circuit: Can't drive some replacement EL material (the material tends to itself fade out with time) I've put under the LCD display to very decent brightness. It's too dim under room lighting. Power is 5V supplied bottom right, I'm ass


Invention? Electrolumincense foil as microscope backlight!

Started by Jan Panteltje in sci.electronics.design9 years ago 15 replies

These EL (Electro Luminicense) foils are for LCD backlight. They make nice even light, you can cut them in shape too. Run on about 80V AC,...

These EL (Electro Luminicense) foils are for LCD backlight. They make nice even light, you can cut them in shape too. Run on about 80V AC, little converter makes it run on battery from .7 to 5 V. My first idea was to use it as message board... http://panteltje.com/pub/EL_foil_message_board_IMG_3754.GIF put it in front of window, text can be written with a marker, and wiped off the plasti...


Universal display interface

Started by bitrex in sci.electronics.design4 years ago 1 reply

For debugging/repair purposes, does anyone make some kind of widget that you plug into another widget's LCD display ribbon cable connector, suss...

For debugging/repair purposes, does anyone make some kind of widget that you plug into another widget's LCD display ribbon cable connector, suss out what kind of protocol it's dealing with from some list of common display controller ICs, then say send the data via serial/USB to a PC so you can see what the display _would_ be showing in a GUI and/or log it?


Photon counting w/ APD's

Started by George Herold in sci.electronics.design4 years ago 14 replies

This is a bit of a shot in the dark, but I wonder if anyone has used 'garden variety' APD (Avalanche Photodiodes) in the photon counting mode...

This is a bit of a shot in the dark, but I wonder if anyone has used 'garden variety' APD (Avalanche Photodiodes) in the photon counting mode where they are biased above their breakdown voltage? I just got a quote on some of these, https://www.lasercomponents.com/fileadmin/user_upload/home/Datasheets/lcd/sar-series.pdf The difference between the SAR and SARP looks mostly to be the noise ...


Troubleshooting LCD (alphanum) display problem

Started by Don Y in sci.electronics.design10 years ago 5 replies

Hi, I have a NAVITEK LAN/cable tester (for want of a better name). It includes a two line alphanumeric (plus icons) display to present...

Hi, I have a NAVITEK LAN/cable tester (for want of a better name). It includes a two line alphanumeric (plus icons) display to present prompts and results to the user. The display has developed faults -- similar to "dropped pixels". I'm trying to figure out the best way to sort out where the problem might lie -- in the display connection *or


where to find a list of ID codes on recent SMT parts?

Started by Jamie in sci.electronics.design10 years ago 4 replies

Today at my bench, my boss wanted me to look at a simple inverter for a panel touch screen LCD monitor. While collecting information I found...

Today at my bench, my boss wanted me to look at a simple inverter for a panel touch screen LCD monitor. While collecting information I found that the ID codes on the smt did not match what usually go by. For example I had a "2A (underscore V) 3D" on a sot23 transistor. The chart tells me it is a 3906 (pnp) transistor however, I found that it is actually closer to being a fet transi...